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gh-93475: Expose FICLONE and FICLONERANGE constants in fcntl (#93478)

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Illia Volochii 2022-06-07 00:21:58 +03:00 committed by GitHub
parent 46fde1feb5
commit d1e2e0e1b2
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6 changed files with 24 additions and 2 deletions
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6
Doc/library/fcntl.rst
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@ -50,6 +50,12 @@ descriptor.
constants, which allow to duplicate a file descriptor, the latter setting
``FD_CLOEXEC`` flag in addition.
.. versionchanged:: 3.12
On Linux >= 4.5, the :mod:`fcntl` module exposes the ``FICLONE`` and
``FICLONERANGE`` constants, which allow to share some data of one file with
another file by reflinking on some filesystems (e.g., btrfs, OCFS2, and
XFS). This behavior is commonly referred to as "copy-on-write".
The module defines the following functions:

2
Misc/NEWS.d/next/Library/2022-06-04-00-11-54.gh-issue-93475.vffFw1.rst Normal file
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@ -0,0 +1,2 @@
Expose ``FICLONE`` and ``FICLONERANGE`` constants in :mod:`fcntl`. Patch by
Illia Volochii.

9
Modules/fcntlmodule.c
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@ -8,6 +8,9 @@
#ifdef HAVE_SYS_FILE_H
#include <sys/file.h>
#endif
#ifdef HAVE_LINUX_FS_H
#include <linux/fs.h>
#endif
#include <sys/ioctl.h>
#include <fcntl.h>
@ -572,6 +575,12 @@ all_ins(PyObject* m)
#ifdef F_GETPIPE_SZ
if (PyModule_AddIntMacro(m, F_GETPIPE_SZ)) return -1;
#endif
#ifdef FICLONE
if (PyModule_AddIntMacro(m, FICLONE)) return -1;
#endif
#ifdef FICLONERANGE
if (PyModule_AddIntMacro(m, FICLONERANGE)) return -1;
#endif
/* OS X specifics */
#ifdef F_FULLFSYNC

3
configure generated vendored
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@ -8847,7 +8847,8 @@ $as_echo "#define STDC_HEADERS 1" >>confdefs.h
# checks for header files
for ac_header in \
alloca.h asm/types.h bluetooth.h conio.h crypt.h direct.h dlfcn.h endian.h errno.h fcntl.h grp.h \
ieeefp.h io.h langinfo.h libintl.h libutil.h linux/auxvec.h sys/auxv.h linux/memfd.h linux/random.h linux/soundcard.h \
ieeefp.h io.h langinfo.h libintl.h libutil.h linux/auxvec.h sys/auxv.h linux/fs.h linux/memfd.h \
linux/random.h linux/soundcard.h \
linux/tipc.h linux/wait.h netinet/in.h netpacket/packet.h poll.h process.h pthread.h pty.h \
sched.h setjmp.h shadow.h signal.h spawn.h stropts.h sys/audioio.h sys/bsdtty.h sys/devpoll.h \
sys/endian.h sys/epoll.h sys/event.h sys/eventfd.h sys/file.h sys/ioctl.h sys/kern_control.h \

3
configure.ac
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@ -2504,7 +2504,8 @@ AC_DEFINE(STDC_HEADERS, 1, [Define to 1 if you have the ANSI C header files.])
# checks for header files
AC_CHECK_HEADERS([ \
alloca.h asm/types.h bluetooth.h conio.h crypt.h direct.h dlfcn.h endian.h errno.h fcntl.h grp.h \
ieeefp.h io.h langinfo.h libintl.h libutil.h linux/auxvec.h sys/auxv.h linux/memfd.h linux/random.h linux/soundcard.h \
ieeefp.h io.h langinfo.h libintl.h libutil.h linux/auxvec.h sys/auxv.h linux/fs.h linux/memfd.h \
linux/random.h linux/soundcard.h \
linux/tipc.h linux/wait.h netinet/in.h netpacket/packet.h poll.h process.h pthread.h pty.h \
sched.h setjmp.h shadow.h signal.h spawn.h stropts.h sys/audioio.h sys/bsdtty.h sys/devpoll.h \
sys/endian.h sys/epoll.h sys/event.h sys/eventfd.h sys/file.h sys/ioctl.h sys/kern_control.h \

3
pyconfig.h.in
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@ -685,6 +685,9 @@
/* Define if compiling using Linux 4.1 or later. */
#undef HAVE_LINUX_CAN_RAW_JOIN_FILTERS
/* Define to 1 if you have the <linux/fs.h> header file. */
#undef HAVE_LINUX_FS_H
/* Define to 1 if you have the <linux/memfd.h> header file. */
#undef HAVE_LINUX_MEMFD_H